Planning a Professional Holiday Light Installation: Timeline, Power, and What to Ask

The short answer: book by November 1, count amps before strands

Two decisions cause most of the December phone calls: booking late, and designing a display the house cannot power. Book by November 1. In the Treasure Valley the working install window runs from roughly the second week of October through Thanksgiving, when shingles are dry and afternoon highs still sit in the 50s and 60s. Boise's average first freeze lands mid-October, and once the valley settles into inversion in late November, north-facing roof planes hold frost past 10 a.m. and stop being safe to walk. The power side is where displays actually get cut down. A 15-amp circuit gives you 1,440 usable watts. Two hundred feet of incandescent C9 at 12-inch spacing draws about 1,400 of them. The same 200 feet in commercial LED C9 draws roughly 150. That single number decides whether you need an electrician before you need an installer.

The calendar that actually governs the job

September is when crews measure, quote, and place product orders, and it is the month you still get to pick a date rather than accept one. October is the work month: dry shingles, highs in the 50s and 60s, and enough daylight to finish a two-story before dusk. Lights go up dark and sit on a timer until you want them lit, so installing early buys a safe roof, not an early season. By December, valley lead times commonly run past two weeks and one storm pushes the whole board back a day. Set the timer against sunset rather than the clock; Boise's earliest sunset is about 5:06 p.m. in the second week of December, and a photocell or astronomic timer follows that drift without resetting. Check your CC&Rs before you settle dates. Master-planned neighborhoods in Meridian and Eagle often set both an install and a removal window.

The power math that decides how much roofline you can light

Run this before you buy a strand. A 15-amp circuit delivers 1,800 watts, but holiday lights are a continuous load, so the working ceiling is 80 percent of that: 1,440 watts, or 12 amps. A 20-amp circuit gives 1,920 watts, 16 amps. Incandescent C9 bulbs draw 7 watts each at 12-inch spacing, so every foot of eave costs 7 watts and 200 feet ends the circuit. Commercial LED C9s draw 0.5 to 0.8 watts, so the same run lands near 150 watts. That gap also sets your chaining limit: the plug on an incandescent set carries a 3- to 5-amp fuse, which stops you at two or three sets end to end, while LED sets often chain 40 or more. SPT-1 zip cord is rated 7 amps, SPT-2 is rated 10. Every outdoor receptacle needs GFCI protection and a while-in-use cover.

What to ask before money changes hands

How do you attach to the roofline? The only acceptable answer is clips gripping the gutter lip or sliding under a shingle tab. Staples into fascia and nails through architectural shingle both create leaks you will be chasing for years. Can you email a certificate of insurance showing general liability and workers' compensation? Height work belongs on their policy, not your homeowner's. Which circuit are we on, and how many amps is the finished display pulling? A crew that cannot answer has not done the math. Who owns the lights, and what does year two cost? Is a midseason service call included, and how fast, because something fails in the second week of December. Is takedown included, and on what date, in writing at booking. And is the quote per linear foot or per roofline, since a gabled two-story and a wide ranch of the same footprint produce very different numbers.

Lease, buy, DIY, or go permanent

Full-service seasonal pricing, where the installer supplies commercial product, hangs it, services it, removes it and stores it, commonly runs $3 to $7 per linear foot in year one and drops to roughly $2 to $4 on renewals once the product cost is spent. A 150-foot front roofline therefore lands near $450 to $1,050 the first season in most markets. Buying your own commercial C9 LED runs about $1.50 to $3 a foot in product, plus clips at 10 to 25 cents each and an outdoor timer at $20 to $40, and it lasts eight to ten seasons. Permanent track lighting installed under the eave runs roughly $30 to $60 per linear foot, so $4,500 to $9,000 on that same 150 feet. Reflekt quotes per roofline rather than per foot, with install, takedown and off-season storage in the number. Meridian-based, fully insured, 4.9 stars across 125+ Google reviews.

When to skip the pro, and what nobody can fix

Here is the part that costs us work. If you own a single-story ranch, the front eave is reachable from a six-foot step ladder, and the footing is level and dry, hang your own. Clips, one good LED C9 run, and a timer is a Saturday afternoon. Hiring out earns its keep on second-story gables and steep rakes where the ladder stands in a flowerbed. Second, do not buy permanent track lighting if you only light the house for six weeks a year. At $4,500 to $9,000 it needs nine or more seasons to beat a seasonal service, and you are betting on the controller and the app outliving the roof. Third, some things no crew solves. If your only exterior receptacle is on the front porch, nobody should run a cord through a window sash to reach the back roofline. That is a $200 to $400 electrician call, and it comes first. Neither do we load a strand onto a gutter already pulling off soft fascia, or put anyone on iced shingles at any price.